AndysC3

iTrader: (14)

That's the minimum that I would recommend. Also a fuel pressure gauge is good to have but not necessary on a na build. And you def want an in person/ Dyno tune

Mangled03gmc

iTrader: (95)

Well that could def be a issue. I would have figured that the tuner would have questioned the fuel system. Isn't that something that is on the form you do when you buy a tune? I know I had to give that info.

LQ4JOSE

pm me details on it please


yes the tune was done by nelson via mail. So im currently looking for the most reputable tuner localy


yeah ive been actually looking into one already, are there any out there that are better than otheres? my brother has a high dollar snap on sacnner that will keep me from spending money on one.




its been a while since i filled out that from i don't recall if i had to fill it out or not i'm going to address the fuel issue before i send it back to nelson one more time.






okay so it looks like immediate issues to be addressed are.


1)better injectors- would 8.1 injectors be enough for my set up?
2)fuel pump- what is everyone running with success
3)wideband- ive been actually thinking of getting one and the fact it got brought up just reassures things.
4)tune- like i stated before i will try nelson one more time but i will look into getting a in person tune

LQ4JOSE

Also what would you guys recommend as far the spark plugs go in running ac delco 41-110s gaped at .040

kelsey_canard

iTrader: (5)

IMO, I would opt for buying hptuners. I got the standard version for 500 And it came with enough credits to do 4 or 5 vehicles. I tuned my truck and charged a few people to tune their bolt on trucks once I got used to tuning. The tuner paid for itself, and I still use the scanner for all kind of diagnostics. Just buying that would eliminate a need for a tune and a scanner.

I use an innovative lc1 wideband, but there are many good ones out there. I'm happy with mine. Also, I'm not the best with fuel systems, but I would think a 255lphpump and 42lb injectors would be adequate.

Mangled03gmc

iTrader: (95)

The innovate WB is good. Also I like my auto meter WB. PLX also makes a good one. I would run STOCK ngk plugs, tighten the gap up to 30ish. The marine injectors should be enough for your set up. Your stock fuel pump should be enough for your set up. If you plan to stay with that set up, that should fill the FP issue. You could also run a walbro 255 in line for safe measure, or if you have time, drop the tank and put big one in the tank

03sierraslt

iTrader: (22)

Based on your chart it looks like it starts loosing steam at 5400rpm. That cam should pull higher and stronger then that unless your lean. If you are lean it may be pulling timing also. As already mentioned stock injectors are damn near maxed on a 6.0 anyway let alone with your mods. I think you need more fuel my friend.

From 5400-6000 you should gain way more then 8-10hp with that cam.

Vortec350ss

iTrader: (20)

I agree the fuel system is not up to the task... but there are other serious issues going on here. peaking at 230 tq is not a result of a lacking fuel system. Even if the fuel system isnt up to the task it will still handle everything a cammed motor has to throw at it until 4k... and this engine should be making MUCH MUCH more power at even 3500 than when it peaked at 5300.

My 4x4 crew cab with a smaller cam, and a tiny *** 2600 converter will post better times and a matching MPH of a mostly stock 2v mustang... ive gone 13.7 at 99 MPH. Similar set ups in a truck like yours should be good for 12's.

Is your 6L even any faster than your stock engine was? It should be making almost literally twice the power.

it looks like the way my buddies SS felt running on a stock tune after a cam/header/exhaust install... I think it literally lost power, but once tuned he grabbed the near 100 that the tuned combo should have been worth.

LQ4JOSE

well i'm not too sure that i will be able to even operate hp tuners enough/properly to get my $500 worth out of it. i would hate to spend that cash and then later on still have to pay someone to tune my truck for me.




ireally do hope my it gains that kind of power when i get my tune straightened out.well i bought the truck as a roller so i never had anything to compare it to. im glad there are people out there making power with some what similar mods in heavier trucks. that gives me hope for when i get mine straightened out.



as far as the the fuel pump goes, im going to spend the money on a intank one since i have access to a lift, dropping the tank would be a piece of cake and i really don't know how long that pump has been in there so it would be preventive maintenance as well. and ill buy stock ngk plugs and gap them as mangled recommended, ill be off early tomorrow so ill try to knock them out tomorrow, and ill also have pics of the old plugs for reference as well.

Vortec350ss

iTrader: (20)

Did youo order your nelson tune? Did you order it for all the mods? you should think about having a tune done at a local shop with a dyno who really knows what they are doing as everyone else has suggested. You should be making over 400 HP at the wheels with those mods fairly easily... but until you get your fuel system figured out I wouldn't even bother wasting the money for dyno time... it will all have to be redone. A walbro 255 should do it for the pump... and I'm not sure, but I would guess 42# injectors would do the trick. You want marine 8.1 injectors.

Good god its going to feel scary fast if you think it runs well making 240 at the wheels... it will make literally almost 200 HP more when its running right. I'd look into an intake manifold swap with the RPM's you will be turning with that 6.0. You will see great gains up top.